Use this billable hours calculator to estimate what to charge for your work based on an agreed rate and the time you can bill. Enter an hourly, daily, weekly, or monthly rate, then choose the unit for your working time. The calculator returns total earnings and the equivalent hourly rate.
What are billable hours?
Billable hours are the time you can charge a client under your agreement. Depending on the project, that may include production work, research, meetings, consulting, and revisions.
Time spent working is not necessarily time you can bill. Sales calls, proposal preparation, bookkeeping, and other administrative work may be nonbillable. Whether a particular activity is chargeable depends on the terms you agreed with the client—not simply on whether you performed it.
This calculator estimates the value of billable time. It does not track work sessions or decide which activities qualify for billing.
How to use the billable hours calculator
- Enter your Rate. Use the amount you charge for the period selected in the next field.
- Select “per.” Choose hour, day, work-week, or month. For example, a $600 daily rate means entering 600 and selecting day.
- Enter Working time. Include only the time you intend to charge for when estimating client revenue.
- Select the Time unit. Choose hours, days, work-weeks, or months. This does not have to match your rate period.
- Review Total Earnings and Hourly wage. Total Earnings is the value of the entered time; Hourly wage is your rate converted to an hourly equivalent.
Time conversions used by the calculator
The calculator uses the following fixed conversions for both the rate period and working time:
| Time unit | Hours used |
|---|---|
| Hour | 1 |
| Day | 8 |
| Work-week | 40 |
| Month | 176 |
These are conversion assumptions, not a count of actual working hours in a calendar period. If your days are shorter or longer than eight hours, or a particular month has a different schedule, enter the actual billable hours and select hours as the Time unit.
If your daily rate covers something other than eight hours, convert it to the appropriate hourly rate yourself before using the calculator.
How to calculate billable hours and their value
First, add up the time spent on activities that your client agreement permits you to bill. Exclude nonbillable work and unpaid breaks, and apply any agreed billing increments consistently. Then multiply the resulting billable hours by your hourly rate:
Billable value = Hourly rate × Billable hours
When you select other time units, the calculator converts both entries to an hourly basis:
Hourly wage = r ÷ p
Total Earnings = (r ÷ p) × t × u
- r: the amount entered in Rate.
- p: hours in the selected rate period: 1, 8, 40, or 176.
- t: the number entered in Working time.
- u: hours in the selected Time unit: 1, 8, 40, or 176.
Example: a daily rate billed over three work-weeks
Suppose you charge $600 per day and expect to bill 3 work-weeks.
- Equivalent hourly rate: $600 ÷ 8 = $75 per hour.
- Billable time: 3 × 40 = 120 hours.
- Total Earnings: $75 × 120 = $9,000.
This estimate assumes all 120 hours are billable. If those three weeks include unpaid administrative work, enter only the chargeable hours instead.
What do the results mean?
Total Earnings represents gross revenue for the entered time and rate. It is not profit, take-home pay, or a guarantee of payment. The calculation does not deduct expenses, taxes, platform fees, or unpaid invoices, and it does not add separate charges or discounts.
The result labeled Hourly wage is the hourly equivalent of your entered rate. For freelance and consulting work, think of it as an hourly billing rate—not an employee wage or your effective earnings across all working time.
To estimate monthly billings, use your expected billable hours for that month. Selecting one month automatically uses 176 hours, which may overstate revenue if some of your schedule is nonbillable.
How nonbillable work affects your effective hourly earnings
Your quoted rate can look healthy while your revenue per hour actually worked is much lower. To understand the difference, divide project revenue by all time spent on the project, including nonbillable work.
For example, Mark is a freelance programmer who charges $60 per hour. He spends five eight-hour days discussing requirements and estimating a project, followed by 15 eight-hour days coding it.
| Measure | Only coding is billed | Consulting and coding are billed |
|---|---|---|
| Total time worked | 160 hours | 160 hours |
| Billable time | 120 hours | 160 hours |
| Rate charged | $60 per hour | $60 per hour |
| Gross revenue | $7,200 | $9,600 |
| Revenue per hour actually worked | $45 | $60 |
If Mark bills only the 120 coding hours, he would need to charge $80 per hour to generate the same $9,600 in gross revenue. That does not necessarily mean the same profit, since expenses may differ.
Consulting time should only be billed if the client has agreed to it. Otherwise, Mark can account for that time when setting his rate or negotiating a fixed project fee. Tracking both billable and total working time also helps him assess his economic productivity.
Using your estimate for quotes and revenue planning
- Check project scope. Estimate time for research, meetings, production, and revisions, then identify which activities the client will pay for.
- Use realistic capacity. Allow for administration, sales, time off, and other commitments before forecasting billable hours.
- Compare estimates with actual time. After a project, review where hours differed so your next quote is better informed.
- Calculate different rates separately. If tasks or team members have different billing rates, calculate each portion separately and add the totals.
Related calculators
- Use the billing rate calculator to evaluate whether your hourly rate supports your income goals and expected billable time.
- Use the salary to hourly rate converter when comparing wages expressed over different periods.
- For team capacity planning, the absence rate calculator can help you assess time lost to absences. Track this separately from nonbillable work.
Offer a time-based quote calculator on your website
If clients regularly ask what a project will cost, a customized calculator can help them explore estimates before requesting a detailed quote. With Calcopolis, you can build a quote calculator for your service website using your own rates, time estimates, and pricing rules. Clearly state what the estimate includes and when a final quote requires a scope review.